Carson has not officially informed ASU that this will be his last season, but it seems to go without saying after he averaged 18.5 points, 5.1 assists, 3.7 rebounds a 1.2 steals in his freshman year, leading ASU to a 22-13 record.

"It was a hard enough decision to come back" for his sophomore season, said a source familiar with situation.

Carson, 21, put his name in for consideration for the 2013 NBA draft but took himself out of the mix when a panel of NBA scouts said that he would not go in the lottery, the first 14 picks of the draft.

The co-Freshman of the Year with
UCLA's Shabazz Muhammad, Carson led NCAA freshmen in scoring and ranked sixth all-time among Pac-12 freshmen in season scoring and assists.

ASU is leaving for an exhibition tour of China later this week.

The 5-foot-11 Carson is projected as the 17th pick in the 2014 draft by one draft service. He was ineligible to play in 2011-12 because of academic issues.